KR20020000509A - Device for switching air flow passages - Google Patents

Abstract

PURPOSE: An air passage changeover device that is capable of preventing air leak from a gap between a housing and a rotor, and a lock of the rotor and a motor is provided. CONSTITUTION: The device comprises the rotor(71) having an air inflow port(R0) in the rotation axis direction, and an air discharge port(R1) communicated to the air inflow port(R0) in the circumferential direction, the housing(72) including the rotor(71) to be rotatable, and having an air inflow port(H0) in the rotation axis direction, and a plurality of air outflow ports(H1-H5) in the circumferential direction, and the motor(73) to drive the rotor(71) to rotate in such a manner that the air outflow port(R1) of it is communicated with either of the air discharge ports(H1-H5) in the housing(72). The housing(72) is formed to have a roughly conical inner surface, and the rotor(71) is formed roughly like a top in a corresponding form to the form of the inner surface of the housing(72).

Description

Air flow switching device {DEVICE FOR SWITCHING AIR FLOW PASSAGES}

The present invention is, for example, used in a water treatment system having a plurality of tanks for storing and purifying wastewater including food waste comminutes from a disposer of a sink, and processing in each tank (aeration and precipitation promotion). The present invention relates to an air flow path switching device for switching air flow paths required for transportation between the tanks (air lift) and the like.

In this kind of water treatment system, a blower (air pump) for supplying air for various uses such as aeration, air lift, and precipitation promotion is used.

In this case, in general, since the supply time and the supply amount of air are different for each use, a blower is provided for each use.

For example, in a water treatment system that treats wastewater including food waste comminutes from the disposer, the wastewater containing food waste comminutes from the disposer is once stored in the flow control tank, and the deposit is solidified by an air lift. The liquid component is returned to the flow control tank, the solid component is put into a composting device and composted by organic matter decomposition treatment by microorganisms. In addition, the upper part of the flow regulating tank is transferred to the aeration tank by an air lift, and the organic matter component is separated and processed by the microorganism by the aeration treatment. The upper water of the aeration tank is naturally discharged into the sedimentation separation tank, and the sludge is settled, the upper water is discharged to the sewerage, and the precipitated sludge is returned to the flow adjusting tank by an air lift. In this kind of water treatment system, various kinds of tanks are used.

In the above example, in order to improve the treatment performance of the drainage from the disposer, in the general aeration tank, the aeration blower, the blower for airlifting the upper water of the flow control tank to the aeration tank, and the air-lift sediment of the flow control tank to the solid-liquid separator In addition to the blower for blower and the blower for air lifting (returning) the sediment of the sedimentation separation tank to the flow rate adjustment tank, the blower for the settling promotion aeration of the flow rate adjustment tank can be considered.

In the above water treatment system, since the time, flow rate, and pressure required for aeration, air lift, and the like vary depending on the configuration of the system, a plurality of blowers are required. Therefore, the cost of the system is increased and the size is increased. There was a problem. In addition, although a relatively inexpensive diaphragm pump is used as a blower, since a built-in diaphragm is a consumable, the maintenance cost becomes expensive when a large number is used.

Therefore, as shown in FIG. 8, the present applicant has a rotor 71 having an air inlet R0 in the rotational axis direction and an air inlet R1 communicating with the air inlet R0 in the circumferential direction, and A housing 72 having the rotor 71 rotatably, having an air inlet H0 in the rotation axis direction, and having a plurality of air outlets H1 to H5 in the circumferential direction, and the rotor 71; ) By using an air flow path switching device 70 composed of a motor 73 which rotates so that the air outlet R1 communicates with one of the air outlets H1 to H5 of the housing 72. We have proposed a water treatment system that can supply air for a plurality of applications with large blower pumps. (JP 2000-588 C02F 3/12)

The rotating shaft 74 of the rotor 71 which is rotationally driven by the motor 73 is screwed to the motor shaft 73a via a through hole 72a formed at the bottom of the housing 72.

In addition, a bearing 77a is formed on the upper inner wall of the housing 72 in which the outer circumference of the air inlet R0 of the rotor 71 slides, and an inner wall of the housing 72 in which the air outlets H1 to H5 are formed. The bearing 77B is pressurized and fitted to the outer circumference of the rotor 71 which slides on the outer side. The bearing 77a is formed of a resin bearing member or the like, and the air supplied from the air inlet hole H0 formed in the upper portion of the housing 72 is supplied to the outer circumference of the air inlet hole R0 of the rotor 71 and the housing 72. It prevents leakage between the inner circumference of the). In addition, the bearing 77B pressed against the outer circumference of the rotor 71 is also made of a resin bearing member or the like, and holes in the same path are formed at positions corresponding to the air outlet R1 of the rotor 71. The air can flow out, thereby preventing the air from the air outlet R1 from leaking to the air outlets other than the target air outlets H1 to H5.

When air from the blower is sent to the air flow path switching device 70 shown in FIG. 8, the air inlet hole R0 and the air outlet port R1 of the rotor 71 are provided from the air inlet hole H0 provided in the housing 72. ) Is discharged through the air outlets H1 to H5 of the housing 72.

An air lift or the like is connected to the air outlets H1 to H5 of the housing 72. However, if pressure is applied to the air lift pipe when the air lift is performed at a deep position, the interior of the air flow path switching device 70 is As the pressure rises, air leaks occur in the gap between the housing 72 and the rotor 71 as indicated by arrows in FIG. 9.

Originally, the gap is such that the rotor 71 thermally expands and is in pressure contact with the inner circumferential surface of the housing 72, or the inner circumferential surface of the housing 72 is in thermal expansion and pressurized in contact with the rotor 71. ) And the rotor 71 are in pressure contact with each other, so that the rotor 71 is locked, and the motor 73 directly connected to the rotor 71 is also locked to prevent air flow switching from being impossible. Preset to do so.

In other words, when the air flow path switching device 70 is at a high temperature as described above, for example, when air is continuously sent to the blower pump, the temperature in the blower pump rises, thereby entering the air flow path switching device 70. The temperature of the air rises to increase the temperature of the air flow path switching device 70. In addition, when a water treatment system incorporating an air flow path switching device 70 is installed outdoors, the internal temperature of the water treatment system increases due to an increase in external air temperature or solar radiation in the summer, and the air flow path switching device 70 Increase the temperature of).

When the temperature of the air flow path switching device 70 rises in this manner, the outer diameter of the rotor 71 increases due to thermal expansion.

On the other hand, in the Japanese Patent Application No. 2000-85897, the present applicant has shown that the grooves 78 are formed by reducing the thickness on the outer circumferential surface of the rotor 71 except the periphery of the air outlet R1. Although it has been proposed in advance to reduce the area where the rotor 71 is in pressure contact and makes it difficult to lock the rotor 71 and the motor 73, it is not possible to eliminate all the gaps. In the case of performing an air lift or the like at a deep water depth as shown in FIG. 12, the contact width B of FIG. 12 is shorter than the contact width A shown in FIG. 9, as shown in FIG. Easy to leak As shown in Fig. 10, the gap is filled with the bearings 77d and 77e made of a resin bearing member or the like, but the cost is high because a separate part cost and processing cost are required.

As a result, in order to reduce the leakage of air, problems such as the rotor 71 being easy to lock at the time of thermal expansion / contraction and a load being applied to the motor 73, which shortens the life of the motor 73, etc. If not reversed, there is the opposite task of causing air leakage.

In any of the above cases, the rotation shaft through-hole 72a of the rotor 71 formed at the bottom of the housing 72 has a coaxial view of the inner circumferential surface of the housing 72 and the outer circumferential surface of the rotor 71. Since the inner circumferential surface of the housing 72 and the outer circumferential surface of the rotor 71 are not pressurized in contact with each other, it is impossible in a large hole that gently penetrates, and therefore, it is difficult to assemble. In addition, the rotation shaft 74 of the rotor 71 is screwed to the motor shaft 73a, and the rotor 71 is formed in three places by the through hole 72a, the upper bearing 77c, and the motor 73. Since the inner circumferential surface of the housing 72 and the outer circumferential surface of the rotor 71 do not coincide with each other.

When the pulsation of the blowing air from the blower, the vibration of the other installation environment, or the like is applied to the air flow path switching device 70, the air outlet R1 of the rotor 71 is provided with predetermined air in the housing 72. It is also conceivable that the air outlets R1 and H1 to H5 move from the positions of the outlets H1 to H5, do not coincide, and that stable blowing is impossible.

Accordingly, the present invention has been made to solve such a problem, and an object of the present invention is to provide an air flow path switching device capable of preventing air leakage from a gap between a housing and a rotor and locking of the rotor and the motor.

Another object of the present invention is to provide an air flow path switching device with improved assembly property.

It is also an object of the present invention to provide an air flow path switching device capable of stably blowing air even when pulsation of blower air from a blower, vibration of another installation environment, or the like is applied.

1 is a configuration diagram of an air flow path switching device according to an embodiment of the present invention, (a) is a plan view, (B) is an exploded longitudinal sectional view, (c) is a longitudinal sectional view of the rotor, (d) is a Bottom view, (e) is a top view of a motor.

2 is a view showing the configuration and action after assembling the air flow path switching device, (a) is a longitudinal sectional view at the time of air blowing, (B) is a longitudinal sectional view when the blowing air stops and the housing or rotor is thermally expanded (C) is a side view of a positioning rotary plate, and (d) is a bottom view of a positioning rotary plate similarly.

3 is a view for showing the detail of the air flow path switching device, (a) is a longitudinal cross-sectional view of the entire air flow path switching device, (B) is an enlarged view showing the configuration of the lower surface of the rotor and the bottom of the housing.

4 is a flowchart showing a first control example of the air flow channel switching device.

Fig. 5 is a flowchart similarly showing a second control example of the air flow path switching device.

6 is a flowchart similarly showing a third control example of the air flow path switching device.

Fig. 7 is a flowchart similarly showing a fourth control example of the air flow path switching device.

Fig. 8 is a configuration diagram of a conventional air flow path switching device, (a) is a plan view, (B) is a longitudinal sectional view, and (c) is a perspective view of the rotor.

9 is a cross-sectional view for explaining the problem of the conventional example.

Fig. 10 is a configuration diagram of an air flow path switching device in which the conventional example is improved, (a) is a plan view, (B) is a longitudinal sectional view, and (c) is a perspective view of the rotor.

Fig. 11 is a longitudinal sectional view of the rotor of the air flow path switching device similarly improved in the conventional example.

12 is a cross-sectional view for explaining the problem of the air flow path switching device shown in FIG. 10, FIG.

♣ Explanation of symbols for main part of drawing ♣

R0, (H0): Air inlet R1, H1 to H5: Air outlet

70: air flow path switching device 71: rotor

71B: Side slope 71d: Rotating shaft

71e: cross groove 71f: groove

72: housing 72B: inside slope

72c: top cover 72d: through hole

72f: protrusion 73: motor

73a: motor shaft 73e: cross motor shaft

75: positioning plate 75a to 75e: positioning hole

76: photosensor

In order to achieve the above object, the present invention provides a rotor having an air inlet in the rotational axis direction, the rotor having an air outlet in communication with the air inlet in the circumferential direction, and rotatably housing the rotor, A housing having an air inlet in a direction, the housing having a plurality of air outlets in the circumferential direction, and a motor for rotating the rotor so that the air outlet communicates with any one of the air outlets of the housing; The shape is formed in a substantially bowl shape, and the rotor is formed in an approximately top shape corresponding to the inner surface shape of the housing.

In addition, it is characterized in that the respective diameters are set so that the rotating shaft of the rotor gently penetrates the through hole formed in the bottom of the housing.

The rotor shaft and the motor shaft are connected in a universal joint structure in which the rotor is movable in the motor shaft direction.

In addition, the lower surface of the rotor and the bottom of the housing in contact with the, characterized in that the engaging means for maintaining the rotor in a stopped state at each position where the air outlet of the rotor and the air outlet of the housing is in communication.

On the other hand, it is characterized by including control means for starting the switching of the air outlet, after stopping the operation of the air supply source connected to the air inlet.

Further, it is characterized in that the control means for switching the air outlet is started after a predetermined time elapses after the operation of the air supply source connected to the air inlet is stopped.

In addition, the switching means of the air outlet is characterized by including a control means for starting each predetermined time after a predetermined time elapses after the operation of the air supply source connected to the air inlet is stopped.

Further, it is characterized by including control means for starting the switching of the air outlet after the pressure contact between the housing inclined surface and the rotor side inclined surface is not performed.

In addition, it is characterized by including a control means for starting the switching of the air outlet by detecting a decrease in the internal pressure of the air passage by a detection means for detecting the internal pressure of the air passage.

In addition, the control means, by the internal pressure detection, judges that an abnormality has occurred when the time of lowering the internal pressure reaches a predetermined prescribed value, and characterized in that it executes a process when a predetermined abnormality occurs.

Further, the control means judges that an abnormality has occurred when the lowering time of the internal pressure reaches a predetermined value for each air outlet by the internal pressure detection, and executes a process when a predetermined abnormality occurs. It features.

In addition, the control means monitors the time required for the switching of the air outlet, and when the time reaches a predetermined value, it is determined that an abnormality has occurred, and characterized in that it executes a process when a predetermined abnormality occurs. .

The control means supervises the time required for the switching of the air outlet, and when the time reaches a predetermined value for each combination of the connected air outlet and the switching air outlet, an abnormality occurs. It is characterized in that the processing is carried out when the predetermined abnormality occurs.

In addition, the control means stops the motor used for switching when it is determined that an abnormality has occurred during the switching.

Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.

1 is a configuration diagram of an air flow channel switching device according to an embodiment of the present invention, wherein the same reference numerals as those in FIGS. 8 to 12 denote the same or corresponding parts.

In this embodiment, the inner surface of the housing 72 is formed in a substantially bowl shape, and the rotor 71 is formed in an approximately top shape corresponding to the inner surface of the housing 72. In other words, the angle C formed by the approximately inwardly inclined surface 72b of the housing 72 and the angle D formed by the substantially inclined lateral inclined surface 71b of the rotor 71 have the same angle. It is formed to be. Openings reaching the respective air outlets H1 to H5 are formed on the inner inclined surface 72b of the housing 72 at equal intervals, and the air outlet corresponding to the opening on the side inclined surface 71b of the rotor 71. (R1) is formed. The air inlet H0 of the housing 72 is installed in the upper cover 72c covering the approximately bowl-shaped upper opening, and after the rotor 71 is accommodated in the approximately bowl-shaped space of the housing 72, It is a structure covered with the cover 72c.

Moreover, each diameter is set so that the rotating shaft 71d of the rotor 71 may penetrate the through-hole 72d formed in the bottom part of the housing 72 gently. In other words, the through hole 72d is a large hole with respect to the rotation shaft 71d of the rotor 71.

In addition, in order to connect the rotary shaft 71d and the motor shaft 73a of the rotor 71 to the universal joint structure in which the rotor 71 is movable in the motor shaft direction (thrust direction), a cross is provided to the motor 73. The motor shaft 73e is provided, and the cross groove 71e to which the cross motor shaft 73e is fitted is formed deeper than the height of the cross motor shaft 73e in the rotation shaft 71d of the rotor 71. The load is not applied to the cross motor shaft 73e.

Moreover, it is formed in the lower surface of the rotor 71 and the bottom surface of the housing 72 which contact | connects it, The air outlet R1 of the rotor 71 and the air outlet H1-H5 of the housing 72 communicate. As a locking means for holding the rotor 71 at a stop in each position, projections 72f are formed on the bottom of the housing 72 at the same intervals as the air outlets H1 to H5, and the rotor 71 is provided. The bottom surface of the groove 71f is formed to engage with the projection 72f. As shown in Fig. 3 (b), one of the protrusions 72f and the groove 71f is an inclined surface in accordance with the rotational direction (arrow direction) of the rotor 71.

In addition, a positioning rotary plate 75 is provided on the rotary shaft 71d of the rotor 71, and at the intervals corresponding to the air outlets H1 to H5 around the positioning rotary plate 75. Positioning holes 75a to 75e are formed as shown in Fig. 2 (d), and one of the positioning holes 75a recognizes the current position, and thus is widely formed so as to be distinguishable from others. have. Further, a photosensor 76 is provided so as to be positioned above and below the periphery of the positioning rotary plate 75. The rotor 71 is provided by the photosensor 76 and the positioning rotary plate 75. Is configured to allow positioning of the air outlet port R1 of the head) at any of the air outlet ports H1 to H5 of the housing 72.

By the way, in the structure demonstrated above, at the time of assembling this air flow path switching device 70, the angle C which the inside inclined surface 72b of the substantially bowl shape of the housing 72 makes is approximately Since the angle is equal to the angle D formed by the top side inclined surface 71b, the through hole 72d formed at the bottom of the housing 72 is placed on the rotation shaft 71d on the lower side of the rotor 71. On the other hand, it is easy to assemble when placed in a so-called unneeded hole, and the rotary shaft of the rotor 71 is always used (even during rotation) when the rotor 71 sinks below the drawing due to its own weight and pressure contact. 71d can make the inner inclined surface 72d of the housing 72 and the side inclined surface 71b of the rotor 71 easily correspond to a predetermined position.

Next, in FIG. 2A, a blower pump is connected to the air inlet port H0 of the housing 72, and an air lift pipe or the like is connected to the air outlet ports H1 to H5. When the blower pump is energized and blown, air entering from the air inlet hole H0 of the housing 72 is discharged through the rotor 71 to the air outlets H1 to H5 positioned through the rotor 71. The sealing degree is ensured by the inner inclined surface 72b of 72 and the lateral inclined surface 71b of the rotor 71. Then, when a pressure is applied to the air outlet ports H1 to H5 through which air is sent, the deep air lift is performed. As shown in FIG. The inner inclined surface 72b of) and the side inclined surface 71b of the rotor 71 are in close contact, and air does not leak in a clearance gap.

When switching the air flow path, first, the blower pump connected to the air inlet hole H0 of the housing 72 is stopped, and the inner inclined surface 72b of the housing 72 and the side inclined surface 71b of the rotor 71 are stopped. The pressure contact is not made, and as the motor 71 is driven in a state in which the rotor 71 is placed in the housing 72, the air outlet R1 of the rotor 71 is opened in the housing 72. Even when moving to a predetermined air outlet position, the motor 73 is hardly loaded, and the life of the motor 73 can be extended.

In addition, the connection of the rotor 71 and the motor 73 has the universal joint structure by the cross groove 71e and the cross motor shaft 73e, and the housing 72 of the state of FIG. When the inner inclined surface 72b thermally expands, as shown in FIG. 2 (B), the rotor 71 moves upward along the inner inclined surface 72b so that it is not forcibly fitted and locked to prevent air flow switching from being impossible. can do. Even if the rotor 71 thermally expands, the rotor 71 and the motor 73 are not locked on the same principle.

As shown in FIG. 3, the projections 72f formed on the bottom of the housing 72 and the grooves 71f formed on the lower surface of the rotor 71 are in the rotational direction indicated by the arrow 71 by arrows. When returning, the rotor 71 is biased upward in the drawing, so that the engagement state is released and the inclined plane directions of each other are formed in the rotatable direction, and these are the air outlet ports H1 to H5 of the air flow channel switching device 70. ) Are provided as many as five (in this embodiment). When the rotor 71 comes to a predetermined position and sinks below the drawing due to its own weight and pressure contact, the projection 72f and the groove 71f engage with each other, and the pulsation of the blower air from the blower in the air flow path switching device 70. Even if vibrations of the installation environment or the like are applied, the rotor 71 is held at a predetermined position, so that stable blowing can be performed. In addition, although the locking means of the present embodiment is constituted by the uneven portion of the sphere 71f and the projection 72f, it may be constituted by other locking means.

4-7 is a flowchart which shows the control example of the said air flow path switching device 70. As shown in FIG. In addition, the process shown by these flowcharts is performed by the microcomputer which comprises the control part which is not shown in figure.

Fig. 4 is a flowchart showing the first control example, when the flow path switching routine is called out, first, the operation of the blower pump as the air supply source is stopped (process 101). After the pump stops, the flow path switching motor 73 is turned on after the predetermined time measurement ends as a time required for the pressure drop in the air flow path from the pump stop by the constant time timer (process 102). 103).

Then, using the positioning rotary plate 75 and the photo sensor 76, it is checked whether or not it has rotated to the target switching position (NO loop of judgment 104), and when rotating to the switching position, the motor (73) is turned off (YES from judgment 104 to processing 105). Thereafter, operation of the blower pump is started (process 106).

As described above, the switching of the air outlets R1 and H1 to H5 is started after the predetermined constant time required for the internal pressure reduction after the operation of the blower pump connected to the air inlet H0 is stopped. ), The pressure contact state between the inner inclined surface 72b of the rotor and the side inclined surface 71b of the rotor 71 is released, so that the load applied to the motor 73 is minimized, and the housing 72 and the rotor The wear caused by the friction of 71 can also be extremely reduced.

In addition, when the air supply source is a diaphragm blower or the like as described above, since it takes time for the air flow pressure to drop even when the pump is stopped, it is necessary to allow a certain time as described above. When the pump is stopped, the pressure contact state between the inner inclined surface 72b of the housing 72 and the side inclined surface 71b of the rotor 71b is alleviated, so that the load or housing 72 applied to the motor 73 is reduced. ) And wear of the rotor 71 may be reduced.

By the way, when the internal pressure of the air flow path varies depending on the connected air outlets H1 to H5 because of a different water depth, the inner inclined surface 72b of the housing 72 and the side inclined surface of the rotor 71 are different. The time required for the pressure contact with 71b to be released is also different. Therefore, when the time from the stop of the operation of the blower pump connected to the air inlet port H0 to the start of switching between the air outlet port R1 and the H1 to H5 is set to the above constant time, Although it is set to the longest time required to release a pressurized contact state, it takes time which is unnecessary for switching.

Fig. 5 is a flowchart showing a second control example in which the above countermeasures are taken. When this flow path switching routine is called, first, the operation of the blower pump as the air supply source is stopped as in the control example (process 201).

Next, the positioning rotary plate 75 and the photo sensor 76 are used to check where the current position of the air outlet R1 of the rotor 71 is (decision 202).

When the current position of the air outlet R1 of the rotor 71 is at a position connected to the air outlet H1 of the housing 72, the predetermined Asec timer is determined according to the connection position of the air outlet H1 (process 203). After the time measurement for a predetermined time (A second), which is a time required for the pressure drop in the air flow passage from the pump stop, is completed, the flow path switching motor 73 is turned on (process 208).

In addition, when the present position of the air outlet R1 of the rotor 71 is in the position which communicates with the air outlet H2 of the housing 72, the Bsec predetermined according to the connection destination of this air outlet H2 is predetermined. By the timer (process 204), the flow path switching motor 73 is turned on (processing) after the predetermined time (B second) has expired as the time required for the pressure drop in the air flow passage from the pump stop. 208).

Similarly, when the present position of the air outlet port R1 of the rotor 71 is in a position communicating with the air outlet ports H3 to H5 of the housing 72, the air outlets H3 to H5 are connected to the connection place. Therefore, the time measurement for a predetermined time (C seconds to E seconds) is completed by the predetermined C sec timer to E sec timer (processes 205 to 207) as the time required for the pressure drop in the air passage from stopping the pump. Thereafter, the flow path switching motor 73 is turned on (process 208).

Then, by using the positioning rotary plate 75 photo sensor 76, it is checked whether or not the rotation is made to the target switching position (no loop of judgment 209), and when rotating to the switching position, the motor 73 ) Is turned off (YES from judgment 209? Process 210). Thereafter, operation of the blower pump is started (process 211).

In this way, the time from stopping the operation of the blower pump connected to the air inlet H0 to starting the switching of the air outlet R1 and the H1 to H5 is connected to the connected air outlet H1 to H5. By switching according to the above, the time required for the flow path switching can be shortened.

On the other hand, switching of the air outlet R1 and H1 to H5 is started after the pressure contact between the inner inclined surface 72b of the housing 72 and the side inclined surface 71b of the rotor 71 is not actually performed. The inner inclined surface 72b and the rotor 71 of the housing 72, even if the depth of the air flow source of the connected air outlets H1 to H5 is changed and the internal pressure of the air flow path is changed. Is in a state where the pressure contact state of the lateral inclined surface 71b is canceled and can be executed in the shortest time.

Specifically, it is detected by the pressure sensor that the pressure contact cannot be made from the decrease in the internal pressure of the air flow path, so that the inner inclined surface 72b of the housing 72 and the side inclined surface 71b of the rotor 71 are formed. It is evident that the pressure contact with the was released. As the pressure sensor, a small hole is formed in the wall surface of each air outlet port H1 to H5 side of the housing 72 to connect a pressure sensor of a diaphragm type, and the air outlet port H1 to H5 corresponding to the air flow path is connected. It is also feasible to detect the internal pressure with a pressure sensor, but since the air outlets H1 to H5 corresponding to the air passage communicate with the air outlet H0 of the housing 72, the air inlet H0 of the housing 72 is detected. If it is installed at) side, only one pressure sensor is needed.

Fig. 6 is a flowchart showing the third control example described above. When this flow path switching routine is called out, first, the operation of the blower pump as the air supply source is stopped as in the control example (process 301).

Next, based on the output of the pressure sensor described above, it waits until the pressure falls below a predetermined value (NO loop of judgment 302), and when it decreases, the flow path switching motor 73 is turned on (judgment). 302 Yes (YES) 303).

In addition, in this control example, the switching time counter is reset after turning on the motor 73 (process 304).

Then, by using the positioning rotary plate 75 and the photosensor 76, it is checked whether or not to rotate to the target switching position (judgment 305), and counts up the switching time counter if the switching device is not rotating. (NO from judgment 305 to processing 306), if the counted up switching time exceeds the time required for switching, it is checked whether or not it reaches a predetermined value, and if it does not reach (no (NO)), the process returns to the above judgment 305 and repeats the above-described processing.

If the switching time is rotated to the switching position before reaching the prescribed value, the motor 73 is turned off and the blower pump starts to operate as described above (YES to processing 308 to processing 309 of judgment 305). .

However, when the switching time reaches the specified value, it is determined that an abnormality has occurred, the motor 73 is turned off (stopped), and the process is shifted to a predetermined abnormality occurrence process such as urging the device to be repaired by an alarm or the like. (YES to judgment 310 → processing 311 of judgment 307).

As described above, the pressure sensor detects a decrease in the internal pressure of the air flow path, and then starts switching to the air flow path, whereby the inner inclined surface 72b of the housing 27 and the side inclined surface 71b of the rotor 71. It is evident that the pressure contact with the was released.

In addition, by monitoring the time required for switching the air outlet and determining that an abnormality has occurred when the time reaches a predetermined prescribed value, it is possible to take measures to promote repair of the device by an alarm or the like.

When it is determined that an abnormality has occurred at the time of the switching, by stopping the motor 73 used for the switching, the motor 73 is rotated as it is and the life is not shortened. The risk of damaging parts involved in switching of the back can be kept to a minimum.

In addition, by switching the prescribed value for determining whether the time required for switching is abnormal or not according to the combination of the connected air outlet and the switched air outlet, the occurrence of abnormality is judged in the shortest time according to the interval therebetween. can do.

Fig. 7 is a flowchart showing a fourth control example in which a function is added to the above control example. When this flow path switching routine is called out, first, the operation of the blower pump as the air supply source is stopped in the same manner as the above control example. (Process 401).

After the pump operation stops, in this control example, the breakdown voltage detection time counter is reset (process 402). On the basis of the output of the pressure sensor, it is checked whether or not the internal pressure falls below a predetermined value, and if it does not decrease, the above-mentioned pressure drop detection time counter is counted up (NO from the judgment 403). If the pressure drop detection time counter checks whether or not it reaches a predetermined value as a value exceeding the time required for the pressure drop, and does not reach it (NO in paragraph 405), the process returns to the judgment 403 above, The process described is repeated.

When the breakdown voltage falls below a predetermined value before the breakdown voltage detection time counter reaches a prescribed value, the flow path switching motor 73 is turned on (judgment 403 YES? Processing 406), and the above-described FIG. The same processing as the processing 304 to processing 311 of the flowchart is performed (processing 407 to 414).

On the other hand, when the pressure drop detection time counter reaches the prescribed value, for example, it is determined that an abnormality has occurred in the pressure sensor, and the process shifts to a predetermined abnormality occurrence process (YES to process 415 of judgment 405). In this way, measures can be taken to prompt the repair of the device by an alarm or the like.

The prescribed value of the pressure drop detection time counter can be switched in accordance with the connected air outlets H1 to H5 in the same manner as in the flowchart shown in FIG. In this way, abnormal occurrence can be judged in the shortest time.

According to the present invention described above, a rotor having an air inlet in the rotation axis direction and having an air outlet in communication with the air inlet in the circumferential direction, the rotor being rotatably housed, and an air inlet in the rotation axis direction. A housing having a plurality of air outlets in the circumferential direction, and a motor for rotating the rotor so that the air outlets communicate with any one of the air outlets of the housing, and the inner surface of the housing is approximately in the shape of a bowl. By forming the rotor in a substantially top shape corresponding to the inner surface shape of the housing, airtightness is secured by the inner inclined surface of the housing and the lateral inclined surface of the rotor, thereby reducing air leakage.

Moreover, by setting each diameter so that the rotating shaft of the said rotor penetrates the through-hole formed in the bottom part of the said housing | casing, air leakage can be reduced and assembly property can be improved.

In addition, by connecting the rotating shaft and the motor shaft of the rotor in a universal joint structure in which the rotor is movable in the direction of the motor shaft, the rotor and the motor are locked by the thermal expansion of the rotor and the housing to prevent the air flow path switching from being impossible. Can be.

In addition, air is blown from the blower by forming a locking means for holding the rotor at a stop position at each position where the air outlet port of the rotor communicates with the air outlet port of the housing on the bottom face of the rotor and the bottom face of the housing in contact therewith. Even if a pulsation of air or vibration of other installation environment is applied, the rotor can maintain a stationary state at each position where the air outlet port communicates with the air outlet port of the housing, and thus stable air can be delivered.

On the other hand, by starting the switching of the air outlet port after stopping the operation of the air supply source connected to the air inlet port, the pressure contact state between the inner inclined surface of the housing and the side inclined surface of the rotor is alleviated, so that the load to the motor and the housing Abrasion due to friction with the rotor can be reduced.

In addition, by switching the air outlet port after a predetermined time elapses after the operation of the air supply source connected to the air inlet port is stopped, the pressure contact state between the inner inclined surface of the housing and the side inclined surface of the rotor is canceled and the motor is released. The load on the furnace is minimal and there is very little wear due to friction between the housing and the rotor.

The switching of the air outlet can be started after a predetermined time elapses for each air outlet after stopping the operation of the air supply source connected to the air inlet, thereby reducing the time required for the flow path switching.

In addition, the switching of the air outlet is started after the pressure contact between the inclined surface of the housing and the inclined side of the rotor cannot be performed, thereby changing the depth of the air flow source of the connected air outlet and changing the internal pressure of the air flow path. Even in the case of a change, the pressure contact state between the inclined surface of the housing and the inclined side of the rotor is released, and in addition, it can be performed in the shortest time.

In addition, the switching of the air outlet port is started after detecting the decrease in the internal pressure of the air flow path by the detecting means for detecting the internal pressure of the air flow path, thereby canceling the pressure contact state between the inclined surface of the housing and the inclined side surface of the rotor. I can know for sure.

Furthermore, by the internal pressure detection, when the drop time of the internal pressure reaches a predetermined prescribed value, it is determined that an abnormality has occurred, and a process for urging the device to be repaired by an alarm or the like is executed by executing a predetermined error occurrence process. Can be taken.

When the internal pressure drop time reaches a predetermined value for each air outlet, the internal pressure detection determines that an abnormality has occurred and executes a predetermined abnormality occurrence process, thereby causing the abnormality to occur in the shortest time. You can judge.

In addition, by monitoring the time required for switching of the air outlet and determining that an abnormality has occurred when the time reaches a predetermined prescribed value, the device is repaired by an alarm or the like. Prompt action can be taken.

In addition, the time required for switching the air outlet is supervised, and when the time reaches a predetermined value for each combination of the connected air outlet and the switching air outlet, it is determined that an abnormality has occurred, and a predetermined abnormality occurs. By executing the process, occurrence of abnormality can be judged in the shortest time according to the interval therebetween.

In addition, when it is determined that an abnormality has occurred at the time of the above switching, by stopping the motor used for switching, the motor is left in a rotating state so as not to shorten the service life, and parts related to switching such as a connection part with the motor are replaced. The risk of damage can be kept to a minimum.

Claims (14)

A rotor having an air inlet in the rotation axis direction, the rotor having an air outlet in communication with the air inlet in the circumferential direction, and rotatably housed the rotor, and having an air inlet in the rotation axis direction, and a plurality of air in the circumferential direction A housing having an outlet and a motor for rotating the rotor such that the air outlet is in communication with any one of the air outlets of the housing, And an inner surface of the housing is formed into a substantially bowl shape, and the rotor is formed into an approximately top shape corresponding to the inner surface of the housing. The method of claim 1, The rotation axis of the rotor, the air flow path switching device, characterized in that each diameter is set so as to gently pass through holes formed in the bottom of the housing. The method of claim 2, And a rotary shaft and the motor shaft of the rotor in a universal joint structure in which the rotor is movable in the motor shaft direction. The method of claim 3, wherein An air flow path formed on a lower surface of the rotor and a bottom surface of the housing in contact with the rotor, the locking means for holding the rotor at a stop position at each position in communication with the air outlet of the rotor and the air outlet of the housing; Switching device. The method of claim 4, wherein And a control means for switching the air outlet through starting the operation of the air supply source connected to the air inlet. The method of claim 4, wherein And a control means for starting the switching of the air outlet port after a predetermined time elapses after stopping the operation of the air supply source connected to the air inlet port. The method of claim 4, wherein And a control means for starting the switching of the air outlet port after the operation of the air supply source connected to the air inlet port stops after a predetermined time elapses for each air outlet port. The method of claim 4, wherein And a control means for starting the switching of the air outlet after the pressure contact between the inner inclined surface of the housing and the side inclined surface of the rotor cannot be performed. The method of claim 4, wherein And a control means for starting the switching of the air outlet by detecting a decrease in the internal pressure of the air flow path by a detection means for detecting the internal pressure of the air flow path. The method of claim 9, The control means determines that an abnormality has occurred when the internal pressure drop time reaches a predetermined value by detecting the internal pressure, and executes a process when a predetermined abnormality occurs. Device. The method of claim 9, The control means, upon detection of the internal pressure, determines that an abnormality has occurred when the internal pressure drop time reaches a predetermined value for each air outlet, and performs a predetermined abnormality occurrence process. Air flow path switching device. The method of claim 9, The control means monitors the time required for the switching of the air outlet, and when the time reaches a predetermined value, it is determined that an abnormality has occurred, and the air flow path is characterized in that the processing is carried out when a predetermined abnormality occurs. Switching device. The method of claim 9, The control means monitors the time required for the switching of the air outlet, and determines that an abnormality has occurred when the time reaches a predetermined value for each combination of the air outlet connected and the air outlet being switched. An air flow path switching device, characterized in that the processing is carried out when a predetermined abnormality occurs. The method according to claim 12 or 13, And the control means stops the motor used for switching when it is determined that an abnormality has occurred during the switching.